Blowpipe.



J. 11;. DRAEGER. BLOWPIPE.

APPLICATION FILED SEPT. 16, 1907.

'' Patented Apr. 13, 1909;

Inventor.

Witnesses.

m WW en ra n sTATEs. PATE T F JOI-IANN HEINRICH nrtAEeER, or LUBECK, GERMANY, ASSIGNORL or ONE-HALF 'ro TnE FIRM or nnrnennwnax, HEINB. & BnRNn; ngerinenn, or ennon, GERMANY," nun OBIE-HA'LF TO nans'r' wrssif oromEsnEnLoN-rrrn-Mmiv, GERMANY? BLOWPIPE.

No. 917,934. j

Specification of Lettezs Patent. Patented April is, 19 09.

' Application filed September 16,,19p7 Seria1 No.333,085.

' ox gen.

The object of the present invention is to construct the burner so as to enable a single apparatusto be used for a wide range of purposes for instance for welding iron-plates of a great number of thicknesses. Up to the present it was only possible to weld plates of a certain thickness by the aid of a single apparatus, so that a large plant was necessary when oxyhydrogcn or gas-blowpipes were used, and heretofore it was necessary to control the gas, drawn in by the sucking-nozzle, by means of a regulating-valve or cock, which frequently was 0 erated by inex erts who seldom'fulfilled this difficult tas to satisfaction.

1n the drawing accompanying and forming a part of this specification I have shown in detail an advantageous form of embodiment of the invention which to enable those skilled in the art to pra'ctice the same, will be set forth in detail in the following description while the novelty of the invention be included in the claims succeeding the description.

Referring to said drawing, Figure 1 is an elevation of a blow-pipe constructed according to the present invention and Fig. 2 a sec- I tion drawn to the line 2-2 of Fig. 1'.

Corresponding and like parts are referred to in the following description and indicated in the views of the drawing by the same reference letters.

The burner comprises a casin havin three chambersfl, b, and c, of whic a andare lying side by side and parallel to one an;

other and communicate with the third chamber c, which is provided with a mixing nozzle f opposite an oxygen or sucking nozzle (1, that connects the chamber 6 with he chamranged to hold back impurities.

her 0. The mixing nozzle f projects into a mouth-piece mscrewed to the chamber 0.. A as. or acetylene-feed-pipe .g and an. oxygenfeed-pipe h connect with the chambered and I) respectively, at an angle of preferably 90 as'shown. The three chambers (1,1), and c arevclosedby screw-caps or studsi, which can easily be removed to have'access lto tlle inside of the chambers, when itisnecessary.

to exchange the nozzles .or clean the same or.

for other purposes. In the chamberg. for feeding the gas there is also a nozzle or controlling plate 7c provided with a small opening and ada ted to be removed. Preferably a perforate screwsplate-o is mounted above the controlling plate It and between plates 7c and o a wire netting or other filter may be ar- Tllfi object of the small opening in there-movable plate ,k is to control the amount of gas passing from Wh n. setting this controlling plate 7c i s Opening is the chamber a into the chamber a.

made to correspond to the passage of the mixing nozzle f and to a certain extent to the passage of the mouth piece m. y

W hen a metal-plate of a certain thickness is to be welded, oxygen of a predetermined pressure is driven through t e burner, ex-

citing a sucking action on the gas, when passmg overfrom the nozzle (1 to the nozzle f, so as to entrain the requisite amount of gas along with it. When metallates of other thickness are to be welded, a that is necessary to do is to change the mouth-piece m for one of another size and to increase or decrease the pressure of oxygen (for instance by regulating a reducing valvearranged in the pipe notshown). In res onseto the greater or smaller pressure 0 the oxygen more or less gas will be drawn in, thus keeping up the necessary ratio of-mixture. Thus it is possible with one apparatus to weld metal-plates varying from 3 to 6 millimeters in thickness-once the controlling plate is properly dimensioned. Int/his example only four mouth-pieeesare necessary the narrowest bein used for plates of 3 millimeters, the next f0 owin for 31} to 4 millimeters, the

next for 5 imeters and the widest foi76 millimeters. If it is required to weld plates of still smaller or greater thickness the 0011-. trolling plate is ma be exchanged for one having a smaller or. ar er opening. The ad- I justment of the contro ing plate or the subf 'is also removable and can be exchanged by another, which is of importance for the first adjustment, that is before the article is brought on the market.

I claim:

1-. A blow-pipe comprising a gas-chamber, an oxygenchamber, a mixing-chamber, the

last named chamber communicating with the two first named chambers, a sucking nozzle establishing communication between the oxygen-chamber and the mixing-chamber, a mixing nozzle in the mixing-chamber opposite the sucking nozzle and leading outward from the mixing chamber, and astationary plate having a small opening to establish communication between the gaschamber and mixing-chamber, the opening correspondmg 0 relatively, to the opening of the mixing nozzle," to control the amount of gas entering the mixing chamber.

2. A blow-pipe comprising a gas-chamber, an oxygen-chamber, a mixing-chamber, the

last named chamber communicating with the two first named chambers,a sucking nozzle establishing communication between the oxygen chamber and the mixing chamber, a mixing nozzle m the mixing-chamber opposite the sucking nozzle and leading outward from the mixing chamber, a removable stationary plate having a small opening interposed between the gas-chamber and mixingchamber, the opening corresponding relatively to the opening of the mixing nozzle, to

control the amount of gas entering the mix.

ing-chamber.

3. Ablow-pipe comprising a gas-chamber, an oxygen-chamber, a mixing-chamber, the last named chamber communicating with the two first named chambers, a sucking nozzle establishing communication between the oxygen-chamber and the mixing-chamber, a

removable mixing nozzle in the mixingchamber opposite the sucking nozzle and leading outward from the mixing chamber,

and a removable plate having a small open-'- ing to establish communication between the gas-chamber and the mixing chamber, the.

ing communication between the oxygen' chamber and the mixing chamber, a mixing nozzle opposite the sucking nozzle leading outward from the mixing-chamber, a plate having a small opening to establish communication between the gas-chamber and the mixing chamber and a mouth-piece removably attached to the mixing-chamber and forming a prolongation of the mixing-nozzle.

JOHANN HEINRICH DltAEGElt.

Witnesses VV'VALTER GRKFENHAHN,

Fnmnmon I-IATH.,-, 

